Why Is It Taken So Long to Get Rid of Lead?

It was supposed that absent caused a lot of like a mental Hope I guess hallucinations and delusions But it led to the absent murders in France. It's only recently that they've started to bring it back into certain areas but it was dropped off very quickly instead of taking long long time. The reason for that is because with lead It was used in so many different ways and it was beneficial to like in certain properties Like absence Would just get you drunk like that's all it had going for it.